Being male is your biggest risk factor. IIRC (was quoted in a psychiatry lecture, can’t remember cite) 80% of sucessful suicides in the USA are male.
There are 2 peaks, young men aged 16-30, and older men aged 45-70.
If you think about it, it makes sense.
Young men, when they turn their anger and aggression inward, are more likely to be successful in their suicide attempts, because of the methods they choose (hanging, drowning, shooting).
Men may have more difficulty accessing help to deal with the reasons for their distress.
Young men, especially poor, non academically gifted young men, are a particularly disadvantaged group. If they also have a poor social network and few supports, depression can easily lead to suicide before someone is able to intervene.
Older men are at risk, especially if they are single, or recently widowed. This isolation can lead to despair and a feeling that they are no longer needed and will not be missed. This is worsened if there are no children, or the man has a poor relationship with his children.
Older men with alcohol dependence are also more at risk, often because they believe that their life has been a waste, will not improve, and they can neither see a future while they continue to drink, nor do they feel able to quit.
Also, an older man, especially a single or widowed older man, with no dependants, may seek suicide as a solution to the diagnosis of a terminal illness, or as a way or dealing with a chronic disabling or painful condition.
Women, especially women who are mothers, are less likely to commit suicide, and are more likely to survive a suicide attempt.